Air cooled internal combustion engine



Mayza, 1933. G, Q-HOY 1,910,834

.AIRGOOLED INTERNAL COMBUSTION ENGINE `Fi'eel Maron 12, 19:51 2 sheets-sheet 2 Patented May 23, 1933 UNITED STATES GEORGE 0. HOY, F SHAIVIOKIN, PENNSYLVANIA AIR cooLED INTERNAL ,ooivrnnsrronnnernn Application mea March 12, i931. serial `itt/522,084..

This invention relates to means for automatically controlling the flow ot air aro-und the cylinders of air cooled internal combustion engines. In carrying out the invention, I provide a housing which encloses the cylinders of the engine, a passageway for admit ting air to the lower part of this housing, and a passageway for permitting the air to escape from the upper part of the housing. In the air inlet passageway I provide a damper, and in the air escape passageway l provide a thermostat, which latter is c onnccted to the damper so as to cause the damper to gradually open asthe temperature of the air in the housing and outlet passageway increases, thereby admitting a greater volume of cool air to the housing; and as the temperature in the housing and outlet passageway decreases the thermostat causes the damper to move toward lclosed position, thus decreasing the inflow of cool air to the housing.

ln the accompanying drawings,

Fig. 1 is a side elevation of an air cooled internal combustion engine embodying the invention, the casing enclosing the cylinders being shown in central vertical section;

Fig. 2 is a top plan View of the same, partly broken away;

Fig. 3 is a section on the line 3-3 of Fig. l;

Fig. 4 is a horizontal section through the air inlet passageway, showing the valve or damper; and,

Fig. 5 is a section on the line 5-5 of Fig. 4.

Referring to the drawings, a indicates an internal combustion engine having spaced cylinders l, provided with the usual radiating fins 2. These cylinders are enclosed in a housing `3, Within which the air is free to circulate around each cylinder. An air inlet passageway 4 extends along the lower part of the casing at one side thereof, and an air outletpassageway 5 extends `along the upper part of the casing at the `opposite side thereof. Spaced openings 6 lead from the passa eway 4 to the casing, and spaced openingsg lead from the casing to the passageway 5. A fan 8, operated by the engine,

closed position.

forces air into the passageway 4 from whence itlis distributed through the spaced openingsG into `the casing. The air after circulating"around the cylinders passes throughthe spaced openings 7 into the outlet passageway 5 and from thence to the atmosphere. A

In orderto` control theltemperature of the air within the casing, IV provide a valve or damper 9 `in the inlet `passageway which controls the volume of cool air owing to the casing-or vhousing surrounding the cyl# inders.` This damper is mounted upon a rod 10, which extends upwardly, and is provided at its upper end with an arm ll whichis connected by a rod l2 to one arm of a bell crank lever 13, mounted upon" a bracket 14 at the front of the housing. The other arm oi' theilever is connectedby a rod lto a thermostat bar 16, which extends longitudinally `in `the air outlet passageway 5. An opening 17 is provided in the bot-tom of the passageway `4 in advance of the damper 9, and avalve;`18, secured to themed-'10, adapted tocover this opening when the Vda'mp'eris in full open position, and to un# cover thejopening as the damper moves'to When the engineis stopped and cold, the damper 9 extends across the inlet passageway 4. 1 In this position it does not entirely closepthe passageway. When the engine is started,` the `fanblows air into the forward en d of the passageway 4 and the most ot this passes" out through the passageway 17.

As the engine cylinders become heated the air surrounding the cylinders becomes heated and liowing out through the passageway 5 heats the thermostat bar and the lat* ter expands, causing the bell crank 13 to rock and move the rod so that the damper 9 will open gradually and admit more` air to the casing which surrounds the cylinders. It will he evident that as the engine becomes hotter, the damper will open wider and admit more air so that the control of the temperature of the air in the housing will be automatic.

What I claim is:

l. The combination with a multi-cylinder internal combustion engine having spaced cylinders, of a casing enclosing the cylinders, an air inlet passageway extending longitudinally of the casing and having spaced openings communicating with the lower part of the casing, a fan for blowing air into said passageway, a damper in said passageway forV controlling the inlet of air to the casing, an air outlet passageway extending longitudinally of the casing and having spaced openings communicating with the upper part of the casing, a thermostat in said outlet passageway, and connections between said thermostat and damper for operating the latter.

v2. The combination with a multi-cylinder internal combustion engine having spaced cylinders, of a casing enclosing the cylinders, an air inlet passageway extending along the casing at one side thereof and having openings communicating with the casing, a fan for blowing air into said passageway, a damper in said passageway for controlling the inlet of air to the casing, an air outlet passageway extending along the casing at the opposite side from the air inlet passageway and having openings communicating with the casing, a thermostat in said outlet passageway, and connections between said thermostat andV damper for operating the latter.

3. The combination with a multi-cylinder internal combustion engine having spaced cylinders, of a casing enclosing the cylinders, an air inlet passageway extending along the lower part of the casing at one side thereof and having openings communicating with the casing, a fan for blowing air into said passageway, a damper in said passageway for controlling the inlet of air to the casing, an air outlet passageway extending along the upper part of the casing at the opposite side from the air inlet passageway and having openings communicating with the casing, a thermostat in said outlet passageway, and connections between said thermostat and damper for operating the latter.

In testimony whereof I hereunto aiiix my signature.

GEORGE O. HOY. 

